volume | PIER Journals

Abstract

In this proposed work, a miniaturized dual band-pass filter with enhanced selectivity and tunable transmission zero is proposed for an ISM and sub-6 GHz application. The conventional open and short circuited stubs are employed to operate dual band resonance. This prototype consists of a Square Complementary Split Ring Resonator (SCSRR), a unit cell interdigital circuit, and short and open circuited stubs. Further, the selectivity of the filter is enhanced by employing the SCSSR on the ground plane of the filter. The D-CRL resonator consists of a set of interdigital lines that act as main section of the filter which provides dual band-pass filter at ISM and sub-6 GHz bands with the bandwidths of 0.3 GHz and 0.75 GHz, respectively. The experimentally validated filter has 39 and 59% 3-dB fraction bandwidths, maximum insertion losses on both the bands below 0.31 dB, passband impedance matching more than 31 dB, group delay in the range of 0.25 to 0.61 ns, stopband to passband selectivity 89 dB/GHz, and passband to stopband selectivity 93 dB/GHz. The presented dual-band prototype is a better candidate to use in ISM and sub-6 GHz spectrum based high speed digital communication.

1. Liu, Yun, Cristiano Tomassoni, Shanhui Pei, and Yubo Tian, "Compact quad-band band-pass filters using stepped-impedance coupled-line resonators," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 7, e22227, 2020. Google Scholar

2. Abdalla, Mahmoud A., Ahmed A. Abdel Aziz, and Ghader Arafa, "Novel configuration of ultra-wide band uni-planar configuration of complementary split ring resonator composite right/left-handed based band pass filter with sharp roll off and good stopband attenuation," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 30, No. 11, e22400, 2020. Google Scholar

3. Shi, Ling-Feng, Ze-Yuan Fan, and Dong-jin Xin, "Miniaturized low-pass filter based on defected ground structure and compensated microstrip line," Microwave and Optical Technology Letters, Vol. 62, No. 3, 1093-1097, 2020. Google Scholar

4. Souprayen, Oudaya Coumar and Tamilselvan Sadasivam, "Miniaturized conductor‐backed CPW high‐pass filter for C‐band satellite applications," Microwave and Optical Technology Letters, Vol. 61, No. 6, 1478-1481, 2019. Google Scholar

5. Bhardwaj, Priyanka, Subbian Deivalakshmi, and Ramasamy Pandeeswari, "Compact wideband substrate integrated waveguide bandpass filter for X/Ku‐band application," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 6, e22634, 2021. Google Scholar

6. Seyyed Najjar Hoseini, Seyyed Mojtaba, Reza Zaker, and Khalil Monfaredi, "A microstrip folded compact wideband band-pass filter with wide upper stopband," ETRI Journal, Vol. 43, No. 6, 957-965, 2021. Google Scholar

7. Gangwar, Ajay Kumar, Muhammad Shah Alam, Vivek Rajpoot, and Anuj Kumar Ojha, "Filtering antennas: A technical review," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 10, e22797, 2021. Google Scholar

8. Raoufi, Taha and Abbas Ali Heidari, "Compact low‐pass/band‐pass filters based on quarter‐mode substrate integrated waveguide and a connected network of CSRRs," IET Microwaves, Antennas & Propagation, Vol. 13, No. 12, 2177-2184, 2019. Google Scholar

9. Sen, Sarbani and Tamasi Moyra, "Compact microstrip low-pass filtering power divider with wide harmonic suppression," IET Microwaves, Antennas & Propagation, Vol. 13, No. 12, 2026-2031, 2019. Google Scholar

10. Zhang, Ting, Fei Xiao, Jingfu Bao, and Xiaohong Tang, "A compact UWB bandpass filter with a notched band using a multistubs loaded resonator," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 27, No. 1, e21054, 2017. Google Scholar

11. Killamsetty, Vinay Kumar and Biswajeet Mukherjee, "Compact dual bandpass filter for terrestrial radio and GSM applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 27, No. 8, e21131, 2017. Google Scholar

12. Wu, Yong, Qingsheng Zeng, and Yuqiu Shang, "A low-insert loss and high-return loss bandpass filter based on cut-off rectangular waveguide for satellite communication application," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 2, e22351, 2021. Google Scholar

13. Wang, Chien-Jen and Li-Jung Hsu, "Design and analysis of a low-pass filter utilizing a slotted-ground-plane resonator," Microwave and Optical Technology Letters, Vol. 60, No. 4, 905-915, 2018. Google Scholar

14. Rajput, Anil, Kamlesh Patel, and Amit Birwal, "Compact microstrip low pass filter design using U‐shaped folded high‐impedance line," Microwave and Optical Technology Letters, Vol. 60, No. 7, 1812-1815, 2018. Google Scholar

15. Pachaiyappan, Gnanasivam and Parthasarathy Ramanujam, "Design of low profile co-axial fed high gain stacked patch antenna for Wi-Fi/WLAN/Wi-Max applications," Frequenz, Vol. 75, No. 1-2, 27-34, 2021. Google Scholar

16. Ramanujam, Parthasarathy, Krishnamurthy Ramanujam, and Manimaran Ponnusamy, "A novel asymmetrical interdigital coupled line-based penta-band bandpass filter design with enhanced selectivity employing square complementary split ring resonator," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 12, e22888, Aug. 2021. Google Scholar

17. Wei, Feng, Chi Yuan Zhang, Cao Zeng, and Xiao Wei Shi, "A reconfigurable balanced dual-band bandpass filter with constant absolute bandwidth and high selectivity," IEEE Transactions on Microwave Theory and Techniques, Vol. 69, No. 9, 4029-4040, Sep. 2021. Google Scholar

18. Senthilkumar, S., U. Surendar, Parthasarathy Ramanujam, and J. William, "A dual-polarized metamaterial spiral MIMO antenna for 5G applications," Applied Physics A, Vol. 128, No. 7, 607, 2022. Google Scholar

19. Ramanujam, Parthasarathy, P. G. Ramesh Venkatesan, Manimaran Ponnusamy, and T. K. Sethuramalingam, "Design of miniaturized dual-band filtering antenna with improved selectivity utilizing square complementary split ring resonator for 5G MM-wave automobile applications," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 32, No. 11, e23378, 2022. Google Scholar

20. Sambathkumar, Praveena, Krishnamurthy Ramanujam, and Parthasarathy Ramanujam, "Design of 6 × 2 linear feed antenna array with suppressed SLL by employing CCSRR for Ka-band and 5G mm-wave applications," Applied Physics A, Vol. 129, No. 4, 287, 2023. Google Scholar

21. Raoufi, Taha and Abbas Ali Heidari, "Compact low‐pass/band‐pass filters based on quarter‐mode substrate integrated waveguide and a connected network of CSRRs," IET Microwaves, Antennas & Propagation, Vol. 13, No. 12, 2177-2184, 2019. Google Scholar

22. Sen, Sarbani and Tamasi Moyra, "Compact microstrip low-pass filtering power divider with wide harmonic suppression," IET Microwaves, Antennas & Propagation, Vol. 13, No. 12, 2026-2031, 2019. Google Scholar

23. Gangwar, Ajay Kumar, Muhammad Shah Alam, Vivek Rajpoot, and Anuj Kumar Ojha, "Filtering antennas: A technical review," International Journal of RF and Microwave Computer-Aided Engineering, Vol. 31, No. 10, e22797, 2021. Google Scholar

24. Zhao, Xi-Bei, Feng Wei, Peng Fei Zhang, and Xiao Wei Shi, "Mixed-mode magic-Ts and their applications on the designs of dual-band balanced out-of-phase filtering power dividers," IEEE Transactions on Microwave Theory and Techniques, Vol. 71, No. 9, 3896-3905, Sep. 2023. Google Scholar

Mr. Thupalli Shaik Mahammed Basha

Dr. Arun Raaza

Dr. Vishakha Bhujbal

Dr. Mathivanan Meena